public class question3_5{
	public static void main(String args[]){
		int m=8,item=m,i=1;
		long sum=0;
		for(i=1,sum=0,item=m;i<=10;i++){
		sum=sum+item;
		item=item*10+m;
		}
		System.out.println(sum);
	}
}
